Texas Instruments ADS868 Series, Manual

Page: 13 / 67

-1
-0.6
-0.2
0.2
0.6
1
1.4
±
40
±
7
26 59 92 125
Di
ff
e
re
n
tia
l
Non
lin
e
a
rity
(
L
S
B
)
Free-Air Temperature (
o
C)
C013
Maximum
Minimum
-2
-1.5
-1
-0.5
0
0.5
1
1.5
2
0 16384 32768 49152 65536
In
te
g
ra
l
Non
lin
e
a
rity
(
L
S
B
)
Codes (LSB)
C014
0
4000
8000
12000
16000
20000
32764 32766 32768 32770 32772
Num
b
e
r
o
f
Hi
ts
Output Codes
C011
-1
-0.6
-0.2
0.2
0.6
1
1.4
0 16384 32768 49152 65536
Di
ff
e
re
n
tia
l
Non
lin
e
a
rity
(
L
S
B
)
Codes (LSB)
C012
0
4000
8000
12000
16000
20000
32764 32766 32768 32770 32772
Num
b
e
r
o
f
Hi
ts
Output Codes
C010
0
4000
8000
12000
16000
20000
32764 32766 32768 32770 32772
Num
b
e
r
o
f
Hi
ts
Output Codes
C009
ADS8684, ADS8688
www.ti.com SBAS582C – JULY 2014 – REVISED APRIL 2015
Typical Characteristics (continued)
At T
A
= 25°C, AVDD = 5 V, DVDD = 3 V, internal reference V
REF
= 4.096 V, and f
SAMPLE
= 500 kSPS, unless otherwise noted.
Mean = 32767.9, sigma = 0.76, input = 0 V,
Mean = 32767.75, sigma = 0.65, input = 1.25 × V
REF
,
range = ±0.625 × V
REF
range = 2.5 × V
REF
Figure 8. DC Histogram for Mid-Scale Inputs (±0.625 × V
REF
)
Figure 9. DC Histogram for Mid-Scale Inputs (2.5 × V
REF
)
Mean = 32768.90, sigma = 0.75, input = 0.625 × V
REF
, All input ranges
range = 1.25 × V
REF
Figure 10. DC Histogram for Mid-Scale Inputs (1.25 × V
REF
)
Figure 11. Typical DNL for All Codes
All input ranges Range = ±2.5 × V
REF
Figure 12. DNL vs Temperature Figure 13. Typical INL for All Codes
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